(7-2+4) - (2-5)
6*{6-[3-(1-1)]} - (5+1)
9-(9-9)-(2+5)*(7-7)
2*9-7-(7+1+3-1)
2*2+6+1-(3-1-1)
(9-8) * (7+7+2-3)
21 - (5-6+2) - [5- (6-3+1)-2]
0.5/5 +10
[9+6-(2+5+2)]*1
5.8/(2.6-1.8)
9
6
10.1
18
12
7.25
13
1
10
